Item Type: Annular Cutter Material: 40CR, carbide Bit Length: Approx. 95mm / 3.74in Opening Depth: Approx. 50mm / 1.97in Package List 1 x Annular Cutter 1 x Storage Box 150MM DRILLING DEPTH: Annular cutter can form cylindrical holes up to 50mm deep in ferrous and non ferrous metals 2QUICK CUTS: These tools feature a thin walled hollow design with double alternating tooth geometry, providing more efficient and aggressive cuts than traditional hole saws and drills 3ACCURATE AND EFFICIENT: With multiple accurate cutting edges, more accurate holes can be created without flanging 4HIGH TEMPERATURE RESISTANT MATERIALS: Hard alloy steels provide superior cutting properties that can withstand high temperatures and maximize durability 5APPLICABLE MATERIAL: Suitable for cast iron, stainless steel, aluminum, copper, universal and versatile